hexToColor static method

Implementation

static Color hexToColor(String colorStr){
  final hexColorRegex = RegExp(r'^#?([0-9a-fA-F]{3}|[0-9a-fA-F]{6}|[0-9a-fA-F]{8})$');
  if (colorStr.startsWith("rgba")) {
    // Extract rgba values: rgba(r,g,b,a)
    final rgbaValues = colorStr.substring(5, colorStr.length - 1).split(",");
    return Color.fromRGBO(
      int.parse(rgbaValues[0].trim()),
      int.parse(rgbaValues[1].trim()),
      int.parse(rgbaValues[2].trim()),
      double.parse(rgbaValues[3].trim()),
    );
  } else if (colorStr.startsWith("rgb")) {
    // Extract rgb values: rgb(r,g,b), opacity = 1
    final rgbValues = colorStr.substring(4, colorStr.length - 1).split(",");
    return Color.fromRGBO(
      int.parse(rgbValues[0].trim()),
      int.parse(rgbValues[1].trim()),
      int.parse(rgbValues[2].trim()),
      1.0,
    );
  } else if (hexColorRegex.hasMatch(colorStr)) {
    // Handle hex colors with possible # and length 3, 6, 8
    String hex = colorStr.replaceFirst('#', '');
    if (hex.length == 3) {
      // Expand shorthand like 'abc' to 'aabbcc'
      hex = hex.split('').map((c) => c + c).join('');
    }
    if (hex.length == 6) {
      // Add 'ff' alpha if missing
      hex = 'ff' + hex;
    }
    int colorInt = int.parse(hex, radix: 16);
    return Color(colorInt);
  } else {
    throw UnsupportedError('Unsupported color format: $colorStr');
  }
}